Table 2.
Periprosthetic bone mineral density (BMD).
| BMD | Postoperative | 3 months | 6 months | 12 months | 24 months | 0–24 months t test p value |
ANOVA p value |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EBM (n = 30) | BM (n = 31) | EBM (n = 30) | BM (n = 30) | EBM (n = 30) | BM (n = 28) | EBM (n = 30) | BM (n = 28) | EBM (n = 29) | BM (n = 27) | EBM | BM | EBM | BM | |
| ROI1 | ||||||||||||||
| Mean SD | 1.214 (0.17) | 1.219 (0.15) | 1.186 (0.18) | 1.252 (0.19) | 1.16 (0.2) | 1.225 (0.24) | 1.14 (0.17) | 1.195 (0.29) | 1.122 (0.15) | 1.125 (0.24) | 0.001 | 0.044 | 0.609 | 0.546 |
| ΔBMD% CI95 | − 1.1 (− 3.6; 1.7) | − 0.16 (− 0.1; 5.8) | − 3.8 (− 1.2; 8.2) | − 0.16 (− 7.9; 6.1) | − 5.6 (− 8.6; − 2) | − 2 (− 7.5; 8.3) | − 6.5 (− 9.7; − 2.9) | − 8.4 (− 16.4; − 1.7) | ||||||
| p value | 0.094 | 0.348 | 0.461 | 0.659 | ||||||||||
| ROI2 | ||||||||||||||
| Mean SD | 1.993 (0.28) | 1.935 (0.19) | 1.916 (0.28) | 1.915 (0.21) | 1.925 (0.29) | 1.886 (0.21) | 1.934 (0.3) | 1.884 (0.23) | 1.884 (0.3) | 1.847 (0.23) | < 0.0005 | 0.007 | 0.725 | 0.587 |
| ΔBMD% CI95 | − 3 (− 4.3; − 1.5) | − 0.24 (− 1.7; 1.3) | − 3.4 (− 5.4; − 1.6) | − 1.4 (− 3.2; 0.5) | − 3.1 (− 5.1; − 1.2) | − 2 (− 3.9; − 0.05) | − 5.2 (− 7.1; − 3.2) | − 4 (− 6.7; − 1.5) | ||||||
| p value | 0.014 | 0.129 | 0.408 | 0.459 | ||||||||||
| ROI3 | ||||||||||||||
| Mean SD | 2.117 (0.29) | 2.180 (0.26) | 2.019 (0.29) | 2.128 (0.25) | 2.046 (0.28) | 2.107 (0.24) | 2.072 (0.29) | 2.116 (0.25) | 2.046 (0.28) | 2.094 (0.23) | < 0.0005 | < 0.005 | 0.771 | 0.063 |
| ΔBMD% CI95 | − 4 (− 5.3; − 2.8) | − 1.7 (− 2.7; − 0.7) | − 3.4 (− 4.; − 2.5) | − 2 (− 3; − 0.9) | − 2.3 (− 3.3; − 1.4) | − 1.7 (− 2.8; − 0.4) | − 3 (− 4.2; − 2) | − 2.3 (− 3.3; − 1.3) | ||||||
| p value | 0.01 | 0.059 | 0.46 | |||||||||||
| ROI4 | ||||||||||||||
| Mean SD | 1.943 (0.29) | 2.003 (0.31) | 1.88 (0.28) | 1.948 (0.3) | 1.877 (0.29) | 1.956 (0.29) | 1.9 (0.31) | 1.984 (0.3) | 1.888 (0.31) | 1.985 (0.31) | < 0.0005 | 0.2 | 0.729 | 0.629 |
| ΔBMD% CI95 | − 3.2 (− 4.3; − 2.3) | − 1.5 (− 3; − 0.1) | − 3.4 (− 4.7; − 2.4) | − 0.7 (− 2; 0.8) | − 2.5 (− 3.9; − 1.3) | 0.8 (− 1.4; 3.1) | − 2.8 (− 4.3; − 1.6) | − 1.2 (− 0.6; 3) | ||||||
| p value | 0.053 | 0.009 | 0.021 | 0.001 | ||||||||||
| ROI5 | ||||||||||||||
| Mean SD | 2.118 (0.27) | 2.167 (0.26) | 2.059 (0.28) | 2.129 (0.26) | 2.083 (0.28) | 2.126 (0.25) | 2.116 (0.29) | 2.133 (0.26) | 2.104 (0.3) | 2.134 (0.23) | 0.306 | 0.857 | 0.762 | 0.097 |
| ΔBMD% CI95 | − 2.3 (− 3.6; − 1.2) | − 0.8 (− 2.1; 0.4) | − 1.6 (− 3.1; − 0.3) | − 0.5 (− 1.5; 0.6) | − 0.1 (− 1.8; 1.5) | 0.06 (− 1.3; 1.3) | − 0.85 (− 2.5; 0.5) | 0.19 (− 1.9; 1.9) | ||||||
| p value | 0.119 | 0.229 | 0.915 | 0.375 | ||||||||||
| ROI6 | ||||||||||||||
| Mean SD | 1.943 (0.25) | 1.924 (0.21) | 1.88 (0.26) | 1.846 (0.24) | 1.887 (0.26) | 1.861 (0.22) | 1.901 (0.27) | 1.844 (0.22) | 1.907 (0.26) | 1.855 (0.24) | 0.015 | 0.042 | 0.750 | 0.702 |
| ΔBMD% CI95 | − 2.7 (− 4.2; − 1.5) | − 3.7 (− 5.9; − 1.7) | − 3 (− 4.2; − 1.8) | − 3 (− 4.1; − 1.7) | − 2.1 (− 3.6; − 0.8) | − 4.1 (− 5.6; − 2.5) | − 1.7 (− 3; − 0.3) | − 3.3 (− 5.7; − 0.9) | ||||||
| p value | 0.464 | 0.973 | 0.057 | 0.273 | ||||||||||
| ROI7 | ||||||||||||||
| Mean SD | 1.675 (0.21) | 1.791 (0.23) | 1.542 (0.2) | 1.686 (0.26) | 1.515 (0.22) | 1.671 (0.26) | 1.498 (0.22) | 1.605 (0.25) | 1.517 (0.22) | 1.61 (0.26) | < 0.0005 | 0.005 | 0.732 | 0.464 |
| ΔBMD% CI95 | − 6.8 (− 8.8; − 5) | − 1.5 (− 7.3; 9.3) | − 9 (− 11.1; − 6.8) | − 4 (− 9.3; 6.4) | − 10.1 (− 12.3; − 7.9) | − 7.7 (− 13.5; 2.3) | − 8.6 (− 11.3; − 5.8) | − 7 (− 12.9; 3.9) | ||||||
| p value | 0.37 | 0.364 | 0.577 | 0.711 | ||||||||||
BMD in the 7 Gruen zones from postoperatively to 24 months after surgery.